US20110036634A1 - Rock drilling device - Google Patents
Rock drilling device Download PDFInfo
- Publication number
- US20110036634A1 US20110036634A1 US12/736,650 US73665009A US2011036634A1 US 20110036634 A1 US20110036634 A1 US 20110036634A1 US 73665009 A US73665009 A US 73665009A US 2011036634 A1 US2011036634 A1 US 2011036634A1
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- United States
- Prior art keywords
- holding device
- drilling
- feeder holding
- feed beam
- rock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005553 drilling Methods 0.000 title claims abstract description 132
- 239000011435 rock Substances 0.000 title claims abstract description 59
- 238000005065 mining Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/025—Rock drills, i.e. jumbo drills
Definitions
- the present invention pertains to a feeder holding device to be used in drilling and/or bolting.
- the present invention pertains to a feeder holding device according to the preamble of claim 1 .
- the invention also pertains to a rock drilling and/or rock bolting rig according to claim 9 .
- rock drilling and rock bolting In rock drilling and rock bolting, one often uses a rock drilling rig where one or more drilling machines are carried by respective movable arms, or booms.
- the booms are usually flexibly attached to a carrier, such as a vehicle, via one or more joints.
- the drilling machine is usually flexibly attached to the end of the boom away from the carrier via one or more additional joints.
- the drilling machine is usually not attached directly to the boom, instead being normally attached to the boom displaceable by a feed unit, for example, consisting of a feeder holder, which carries a feed beam arranged movably relative to the feeder holder, and furthermore the drilling machine is usually movable relative to the feed beam to achieve great freedom of adjustment during drilling thanks to the telescopic action, without the carrier having to move around.
- a feed unit for example, consisting of a feeder holder, which carries a feed beam arranged movably relative to the feeder holder, and furthermore the drilling machine is usually movable relative to the feed beam to achieve great freedom of adjustment during drilling thanks to the telescopic action, without the carrier having to move around.
- This rock reinforcement is usually done by a combined rock drilling and bolting rig, where the same rig first drills the hole and then installs the bolt.
- the very same rig can be used both to drill the blast holes needed for the ore mining/tunnel driving and for subsequent rock reinforcement by installing bolts.
- rock drilling rig In certain fields of application, such as mining of narrow ore bodies, mining can take place with very low and/or narrow galleries, which places special demands on the rock drilling rig. For example, not only does the desired function need to be assured, but also the existing design constraints must be fulfilled.
- Rock bolting is often done with bolts over 1 meter in length, and when a rock drilling rig is used for bolting in low/narrow galleries it can be hard to produce a feed unit that enables bolting with the required bolt length without needing complex adjustments of the supporting unit and/or feed unit.
- U.S. 7,032,686 B2 shows a rock drilling and bolting rig designed to be used in mines with low gallery height.
- the rig shown can be used to drill a bolt hole and then install a rock bolt in the borehole.
- the drilling machine and bolt holder are arranged along a common circular periphery, and when switching between drilling and bolting the layout rotates about the axis of the circle.
- One purpose of the present invention is to provide a feeder holding device which solves the above problem. This purpose is accomplished with a feeder holding device according to claim 1 .
- the present invention pertains to a feeder holding device to be used with a mining and/or construction machine, such as a rock drilling and/or rock bolting rig, wherein said rock drilling and/or rock bolting rig comprises at least one boom with a first end and a second end, while said first end is attached to a carrier, and said second end is designed to support a feed beam by means of said feeder holding device, wherein said feed beam can be adjusted by means of said feeder holding device in a first drilling position in a first drilling direction and in a second position.
- a mining and/or construction machine such as a rock drilling and/or rock bolting rig
- said rock drilling and/or rock bolting rig comprises at least one boom with a first end and a second end, while said first end is attached to a carrier, and said second end is designed to support a feed beam by means of said feeder holding device, wherein said feed beam can be adjusted by means of said feeder holding device in a first drilling position in a first drilling direction and in a second position.
- the feeder holding device is designed for linear movement of said feed beam from said first drilling position to said second position, while the feed beam in said second position is pointed in a direction parallel to said first drilling direction.
- the present invention has the advantage that switching between drilling and subsequent bolting can occur easily because the feed beam is moved linearly in a direction separate from the drilling direction. Because the movement is linear, one can easily make sure that the feed beam is pointed parallel to the drilling direction even after the movement, and so the feed beam can be used, e.g., to install a rock bolt.
- the feeder holding device can comprise a movement device to bring about said linear movement.
- a drilling machine is arranged to be movable in relation to said feed beam in the drilling direction, at least during operation.
- the invention also pertains to a rock drilling and/or rock bolting rig.
- FIG. 1 shows a rock drilling rig designed to be used in drilling and/or rock bolting at low gallery height according to a sample embodiment of the present invention.
- FIG. 2 shows the feed unit of FIG. 1 in more detail.
- FIG. 3 shows the feed unit of FIG. 2 from a different perspective.
- FIG. 4 shows an alternative embodiment of the present invention.
- FIG. 1 shows a mining machine of the present invention in the form of a rock drilling rig 100 , which is especially suitable to be used in drilling and/or bolting when working in very low galleries.
- a rock drilling rig 100 which is especially suitable to be used in drilling and/or bolting when working in very low galleries.
- the rock drilling rig 100 shown consists of a carrier 101 and a boom 102 , whose one end 102 a is fastened to the carrier.
- the boom 102 consists of two sections 102 ′, 102 ′′, joined by a rotational linking means 102 c to afford great freedom of adjustment during drilling, while at the same time the outer boom section 102 ′′ can retract to facilitate moving around (e.g., by reducing the risk of hitting the surrounding rock).
- a drilling support 103 with support leg 104 is arranged at the end 102 b of the boom 102 away from the carrier 101 .
- a feed unit 105 comprising a feeder holding device according to the present invention, which carries a feed beam.
- the drilling support is attached to the boom via a rotational linking means 102 d and a rotational linking means 130 .
- the rotational linking means 102 d further increases the freedom of adjustment during drilling, and also facilitates positioning of the feed unit 105 during movement.
- the rotational linking means 130 allows drilling not only in an upward direction, as shown, but in any radial direction looking from the axis A of the rotational link.
- a carrier 101 of the type in FIG. 1 is usually controlled not by an operator on board the carrier (due to the relatively small size of the carrier), but instead the rock drilling rig 100 can be controlled remotely by an operator at a suitable control unit, which can be connected to the drilling rig by a cable, for example, or a wireless interface.
- the carrier 101 is provided as usual with functions required by the rock drilling rig, such as control units and hydraulic pumps to drive among other things the boom/drilling support/feed unit/drilling machine.
- the carrier can also have means to operate said hydraulic pump(s), such as an internal combustion engine and/or electric motor, which for example can be operated by connection to appropriate electrical mains.
- FIG. 2 shows the feed unit with feeder holding device of the invention in more detail.
- the feed unit 105 consists of a feeder holding device 106 , which in operation is fastened to the drilling support 103 in a way that is specified below and constitutes part of the present invention.
- a feed beam generally designated 111 and consisting of end pieces 112 , 113 , joined by a web 114 and two guide way pairs 115 , 116 and 117 , 118 , is attached to the feeder holding device.
- the feed beam 111 is movably attached to the feeder holding device 106 in that the guide way pair 117 , 118 runs in lead-through bushings 109 a (and the corresponding bushing 109 b hidden by the feed beam).
- the feed beam 111 is driven relative to the feeder holding device 106 by a hydraulic cylinder (feed cylinder) 119 , whose piston 120 is attached to the end piece 113 .
- the operation of the feed cylinder 119 produces a “stroke length” for the feed beam basically corresponding to the length of the available part of the guide way 117 in the figure.
- a drilling machine 121 is movably attached to the feed beam 111 by a support unit running on guide ways 115 , 116 in the form of a carriage 122 .
- this allows a telescopic feeding of a drill string or rock bolt connected to the drilling machine 121 , the total feeding length consisting of the above-mentioned feed beam feeding length and basically the available length of guide ways 115 , 116 in front of the carriage (of course, for design factors, the movement of the feed beam 111 relative to the feeder holding device 106 or the movement of the carriage 122 relative to the feed beam 111 will be limited so that the entire theoretical stroke length cannot be utilised).
- FIG. 2 also shows a further drilling support consisting of two arms 123 , 124 , which are not part of the present invention, but which can come together during operation so that the holder device 125 , 126 encloses the drill string or rock bolt during drilling/bolting to facilitate control of same.
- separate and independent actively controlled drive mechanisms (such as feed cylinder 119 ) are used to drive the movement of the feed beam 111 relative to the feeder holding device 106 , or to drive the carriage (drilling machine) along the feed beam (e.g., by a second hydraulic cylinder, or a so-called chain feeder, where a chain is driven by a hydraulic gear motor).
- this comprises only one actively controlled drive device (the feed cylinder 119 ), yet movement of the carriage 122 relative to the feed beam still occurs at the same time as and depending on the feed cylinder's movement of the feed beam relative to the feeder holding device 106 .
- This is accomplished in that the carriage is attached to the feeder holding device via fastening devices such as a chain or a wire.
- fastening devices such as a chain or a wire.
- the present invention is exemplified by the embodiment shown in FIG. 2 , it will be understood that it is not limited to this feed unit, but is also applicable to other types of feed units, such as those where feed beam and carriage are driven independently of each other by separate drive means, and even those without telescopic action (e.g., when a drilling machine can move relative to a feed beam which is not movable relative to a feeder holding device).
- What is essential to the invention is the manner of linear movement of the feed beam indicated below.
- the feed unit shown in FIG. 2 is thus very compact, and hence especially suitable to be used in drilling/bolting in extremely narrow (low) galleries.
- the feed beam is secured (by means of the feeder holding device) to the drilling support by a suitable connection, such as bolts, but in the sample embodiment of the present invention in FIG. 2 the feeder holding device is secured to the drilling support via openings (lead-through bushings) 107 , 108 , running along guide ways 301 , 302 (see FIG. 3 ), and it can move along the guide ways 301 , 302 thanks to a hydraulic cylinder 303 arranged on the feeder holding device.
- a suitable connection such as bolts
- the method of rock reinforcement by installing a rock bolt is normally done as follows. First, a borehole is drilled for subsequent installing of a rock bolt. When the hole has been drilled, a resin cartridge is inserted, and then the bolt is pressed into the hole and rotated by means of the drilling machine until the resin has hardened to the desired extent.
- resin instead of resin, one can use bolts which expand by means of water, for example, thus moulding to the borehole and being anchored in the surrounding rock.
- each respective part can be so long that the space from the drilling machine to the borehole in the maximum retracted position is still not enough for the bolt or bolt element to fit between the hole and the drilling machine so that it can be pushed in by this.
- the present invention provides a layout which in a very easy way provides switching between drilling and inserting of bolts in cases when the distance between borehole and drilling machine is not enough to find room for the bolt.
- the feed beam moves in the lateral direction, so that the drilling machine can easily move to a position where it is not in the way of the bolt inserting, thus easily providing a longer clear distance in the outward extension of the borehole, while feed beam and carriage are still pointing in the drilling direction, though displaced laterally relative to the drilling axis, and so can be used to insert the rock bolt as described below.
- FIG. 3 shows the feed unit of FIG. 2 , but from a different perspective, to show the sample embodiment of the invention in more detail.
- the feed unit (feeder holding device 106 ) is secured to the drilling support 103 via openings 107 , 108 , running along guide ways 301 , 302 , and its movement along the guide ways is controlled by a hydraulic cylinder 303 .
- the feeder holding device is moved along the guide ways 301 , 302 such that the feed unit is close to or even abuts against stops 304 , 305 , i.e., opposite what is shown in the figure, where the feed unit is moved away from the stop 304 , 305 during drilling per the above.
- the feed unit when inserting a bolt into a newly drilled hole, the feed unit is moved along the guide ways 304 , 305 to the position shown in FIG. 3 , so that the drilling machine is moved laterally, and the bolt (or a first bolt section, if the bolt consists of several sections) can be placed against the drilled hole (or added to the preceding bolt element) so as to place the end of the bolt away from the hole against a bolt support 306 arranged on the carriage 122 , and then the bolt or bolt element can be pushed into the hole by operation of the feed beam 111 and carriage 122 via the bolt support 306 .
- the feed beam 111 will automatically be properly oriented and thus it can easily be positioned, by operating the cylinder 303 , in the position shown in FIG. 3 for pushing in the bolt.
- the bolt support can be arranged substantially at a longer distance from the drilling hole compared to the front edge of the drilling machine, the invention provides by a simple displacement mechanism thus enables bolting with longer lengths than would be possible without any movement of the drilling machine.
- the drilling machine is moved back thanks to the displacement mechanism into the drilling position, where the drilling machine can be used for appropriate rotation of the bolt.
- the movement mechanism of the invention is shown travelling along two guide ways and essentially perpendicular to the drilling direction.
- the movement need not be perpendicular to the drilling direction, as long as the movement results in the drilling machine moving linearly lateral while retaining the orientation (i.e., in parallel to the drilling direction) of the carriage.
- the guide ways 301 , 302 can be slanted instead.
- FIG. 4 shows part of the feed unit of FIG. 2 , and where the guide ways 301 , 302 running perpendicular to the drilling direction are shown schematically by dashed lines.
- the guides 401 , 402 in FIG. 4 instead are bent backward (compared to the drilling direction), and the feeder holding device has correspondingly slanted openings 407 , 408 so that the drilling machine during displacement is not only moved laterally in parallel to the side, but also somewhat backward, which can make possible, e.g., additional bolt length (it is even conceivable for the guide ways to slant toward the borehole, if appropriate, so that there will be a forward movement instead).
- a feed beam is moved linearly in relation to a boom (or in relation to a device attached to a boom, such as a drilling support) and in a direction other than the drilling direction in such a way that the feed beam after displacement still is parallel to the position before movement.
- the appearance of the feeder holding device can also differ substantially from the embodiment in the figure, without thereby departing from the invention as defined in the enclosed claims.
- the feeder holding device can take on any desired appearance, as long as it provides the movement of the feed beam relative to the boom according to the invention.
- it can consist of only one guide way, or of a totally different movement mechanism, as long as linear lateral movement of the feed beam is allowed with maintained orientation.
- the openings can be integrated with the feed beam, in which case the feed beam thus is laterally displaceable exactly as described above, with the difference that the feed beam is not movable in the drilling direction relative to the feeder holding device.
- the guide ways can be firmly joined to the feed beam, at which they instead travel in suitable means on the boom (or, as in the embodiment illustrated here, a means attached to the boom, such as a drilling support).
- the movement driving means hydroaulic cylinder 303 above
- the invention above has been described in regard to a specific type of feed beam.
- the invention can also be used for other types of feed beams, e.g., feed beams with more or fewer guide ways, or feed beams whose carriage slides along sliding surfaces and not necessarily on guide ways.
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Abstract
Description
- The present invention pertains to a feeder holding device to be used in drilling and/or bolting. In particular, the present invention pertains to a feeder holding device according to the preamble of claim 1. The invention also pertains to a rock drilling and/or rock bolting rig according to claim 9.
- In rock drilling and rock bolting, one often uses a rock drilling rig where one or more drilling machines are carried by respective movable arms, or booms. The booms are usually flexibly attached to a carrier, such as a vehicle, via one or more joints. Furthermore, the drilling machine is usually flexibly attached to the end of the boom away from the carrier via one or more additional joints.
- The drilling machine is usually not attached directly to the boom, instead being normally attached to the boom displaceable by a feed unit, for example, consisting of a feeder holder, which carries a feed beam arranged movably relative to the feeder holder, and furthermore the drilling machine is usually movable relative to the feed beam to achieve great freedom of adjustment during drilling thanks to the telescopic action, without the carrier having to move around.
- Depending on the type of drilling, such as tunnelling or ore mining, different types of rock drilling rigs are used. For example, when driving a tunnel, one often uses large machines with a plurality of booms, so as to drill a plurality of holes at the same time, or nearly so, while in ore mining, for example, it is often desirable for economic reasons to mine the ore in such a way that only the ore body is mined, thereby reducing as much as possible the amount of excess rock that needs to be handled.
- Whether it involves tunnelling or ore mining, it is often necessary to reinforce the rock surfaces exposed by blasting in order to lessen the risk of a cave-in. This reinforcing is often done by first boring a hole and then placing a rock reinforcement bolt in the hole.
- This rock reinforcement is usually done by a combined rock drilling and bolting rig, where the same rig first drills the hole and then installs the bolt. In some applications, the very same rig can be used both to drill the blast holes needed for the ore mining/tunnel driving and for subsequent rock reinforcement by installing bolts.
- In certain fields of application, such as mining of narrow ore bodies, mining can take place with very low and/or narrow galleries, which places special demands on the rock drilling rig. For example, not only does the desired function need to be assured, but also the existing design constraints must be fulfilled. Rock bolting is often done with bolts over 1 meter in length, and when a rock drilling rig is used for bolting in low/narrow galleries it can be hard to produce a feed unit that enables bolting with the required bolt length without needing complex adjustments of the supporting unit and/or feed unit.
- U.S. 7,032,686 B2 shows a rock drilling and bolting rig designed to be used in mines with low gallery height. The rig shown can be used to drill a bolt hole and then install a rock bolt in the borehole. The drilling machine and bolt holder are arranged along a common circular periphery, and when switching between drilling and bolting the layout rotates about the axis of the circle.
- Still, there is a need for an improved rock drilling rig to be used in both drilling and bolting, especially for rock drilling rigs designed for very narrow galleries.
- One purpose of the present invention is to provide a feeder holding device which solves the above problem. This purpose is accomplished with a feeder holding device according to claim 1.
- The present invention pertains to a feeder holding device to be used with a mining and/or construction machine, such as a rock drilling and/or rock bolting rig, wherein said rock drilling and/or rock bolting rig comprises at least one boom with a first end and a second end, while said first end is attached to a carrier, and said second end is designed to support a feed beam by means of said feeder holding device, wherein said feed beam can be adjusted by means of said feeder holding device in a first drilling position in a first drilling direction and in a second position.
- The feeder holding device is designed for linear movement of said feed beam from said first drilling position to said second position, while the feed beam in said second position is pointed in a direction parallel to said first drilling direction.
- The present invention has the advantage that switching between drilling and subsequent bolting can occur easily because the feed beam is moved linearly in a direction separate from the drilling direction. Because the movement is linear, one can easily make sure that the feed beam is pointed parallel to the drilling direction even after the movement, and so the feed beam can be used, e.g., to install a rock bolt.
- The feeder holding device can comprise a movement device to bring about said linear movement.
- Preferably, a drilling machine is arranged to be movable in relation to said feed beam in the drilling direction, at least during operation.
- The invention also pertains to a rock drilling and/or rock bolting rig.
-
FIG. 1 shows a rock drilling rig designed to be used in drilling and/or rock bolting at low gallery height according to a sample embodiment of the present invention. -
FIG. 2 shows the feed unit ofFIG. 1 in more detail. -
FIG. 3 shows the feed unit ofFIG. 2 from a different perspective. -
FIG. 4 shows an alternative embodiment of the present invention. -
FIG. 1 shows a mining machine of the present invention in the form of arock drilling rig 100, which is especially suitable to be used in drilling and/or bolting when working in very low galleries. For example, there are galleries with a height on the order of 1.2 m, where bolting has to be done with bolt lengths of 1.6 m, for example, to reduce the risk of a cave in. - The
rock drilling rig 100 shown consists of acarrier 101 and aboom 102, whose oneend 102 a is fastened to the carrier. Theboom 102 consists of twosections 102′, 102″, joined by a rotational linking means 102 c to afford great freedom of adjustment during drilling, while at the same time theouter boom section 102″ can retract to facilitate moving around (e.g., by reducing the risk of hitting the surrounding rock). At theend 102 b of theboom 102 away from thecarrier 101, adrilling support 103 withsupport leg 104 is arranged. To thedrilling support 103 is fastened afeed unit 105 comprising a feeder holding device according to the present invention, which carries a feed beam. The drilling support is attached to the boom via a rotational linking means 102 d and a rotational linking means 130. The rotational linking means 102 d further increases the freedom of adjustment during drilling, and also facilitates positioning of thefeed unit 105 during movement. The rotational linking means 130 allows drilling not only in an upward direction, as shown, but in any radial direction looking from the axis A of the rotational link. - A
carrier 101 of the type inFIG. 1 is usually controlled not by an operator on board the carrier (due to the relatively small size of the carrier), but instead therock drilling rig 100 can be controlled remotely by an operator at a suitable control unit, which can be connected to the drilling rig by a cable, for example, or a wireless interface. - The
carrier 101 is provided as usual with functions required by the rock drilling rig, such as control units and hydraulic pumps to drive among other things the boom/drilling support/feed unit/drilling machine. The carrier can also have means to operate said hydraulic pump(s), such as an internal combustion engine and/or electric motor, which for example can be operated by connection to appropriate electrical mains. -
FIG. 2 shows the feed unit with feeder holding device of the invention in more detail. Thefeed unit 105 consists of afeeder holding device 106, which in operation is fastened to thedrilling support 103 in a way that is specified below and constitutes part of the present invention. - A feed beam, generally designated 111 and consisting of
end pieces web 114 and twoguide way pairs - The
feed beam 111 is movably attached to thefeeder holding device 106 in that theguide way pair bushings 109 a (and the corresponding bushing 109 b hidden by the feed beam). Thefeed beam 111 is driven relative to thefeeder holding device 106 by a hydraulic cylinder (feed cylinder) 119, whosepiston 120 is attached to theend piece 113. The operation of thefeed cylinder 119 produces a “stroke length” for the feed beam basically corresponding to the length of the available part of theguide way 117 in the figure. - Moreover, a
drilling machine 121 is movably attached to thefeed beam 111 by a support unit running onguide ways carriage 122. In operation, this allows a telescopic feeding of a drill string or rock bolt connected to thedrilling machine 121, the total feeding length consisting of the above-mentioned feed beam feeding length and basically the available length ofguide ways feed beam 111 relative to thefeeder holding device 106 or the movement of thecarriage 122 relative to thefeed beam 111 will be limited so that the entire theoretical stroke length cannot be utilised). - Besides said telescopic feeding,
FIG. 2 also shows a further drilling support consisting of twoarms holder device - In customary feed units, separate and independent actively controlled drive mechanisms (such as feed cylinder 119) are used to drive the movement of the
feed beam 111 relative to thefeeder holding device 106, or to drive the carriage (drilling machine) along the feed beam (e.g., by a second hydraulic cylinder, or a so-called chain feeder, where a chain is driven by a hydraulic gear motor). - As for the feeder holding device shown in
FIG. 2 , this comprises only one actively controlled drive device (the feed cylinder 119), yet movement of thecarriage 122 relative to the feed beam still occurs at the same time as and depending on the feed cylinder's movement of the feed beam relative to thefeeder holding device 106. This is accomplished in that the carriage is attached to the feeder holding device via fastening devices such as a chain or a wire. This is described more in the parallel Swedish patent application with the same filing date, entitled “Feed unit”, applicant Atlas Copco Rock Drills AB and inventor Sven-Olov Nyström. Therefore, refer to this parallel application for a better understanding of the drive mechanism in the feed unit shown inFIG. 2 . - Although the present invention is exemplified by the embodiment shown in
FIG. 2 , it will be understood that it is not limited to this feed unit, but is also applicable to other types of feed units, such as those where feed beam and carriage are driven independently of each other by separate drive means, and even those without telescopic action (e.g., when a drilling machine can move relative to a feed beam which is not movable relative to a feeder holding device). What is essential to the invention is the manner of linear movement of the feed beam indicated below. - The feed unit shown in
FIG. 2 is thus very compact, and hence especially suitable to be used in drilling/bolting in extremely narrow (low) galleries. - Normally, in a usual rock drilling rig, the feed beam is secured (by means of the feeder holding device) to the drilling support by a suitable connection, such as bolts, but in the sample embodiment of the present invention in
FIG. 2 the feeder holding device is secured to the drilling support via openings (lead-through bushings) 107, 108, running alongguide ways 301, 302 (seeFIG. 3 ), and it can move along theguide ways hydraulic cylinder 303 arranged on the feeder holding device. - This allows the drilling machine, after drilling a hole in a first position along a first drilling axis, to move to a second position, displaced in the lateral direction (and possibly also in longitudinal direction) relative to the first position, yet the feed beam (and thus the drilling machine) is still pointing in a direction parallel to the first drilling axis. This has the advantage that the feed unit can be easily used to install rock bolts, as shall be further explained below.
- The method of rock reinforcement by installing a rock bolt is normally done as follows. First, a borehole is drilled for subsequent installing of a rock bolt. When the hole has been drilled, a resin cartridge is inserted, and then the bolt is pressed into the hole and rotated by means of the drilling machine until the resin has hardened to the desired extent. Instead of resin, one can use bolts which expand by means of water, for example, thus moulding to the borehole and being anchored in the surrounding rock.
- As mentioned, especially when bolting in low galleries, one must use bolt lengths many times longer than the height of the gallery to provide the desired protection against collapsing rock masses. This is achieved by the use of divisible bolts, where a first bolt element is first inserted then one or more additional bolt elements are added until the desired bolt length is achieved. Despite this option of bolt lengthening, however, each respective part can be so long that the space from the drilling machine to the borehole in the maximum retracted position is still not enough for the bolt or bolt element to fit between the hole and the drilling machine so that it can be pushed in by this.
- This also means that the drilling machine, after drilling but before inserting the rock bolt, must be moved away before the rock bolt can be inserted, and then be moved back to complete the installation of the bolt. This movement can occur in various ways. The document U.S. Pat. No. 7,032,686 B2 shows a rig with a device where drilling machine and bolt holder lie on a common circular periphery. When a hole has been drilled and a bolt is to be inserted, the device rotates about the axis of the circle, so the bolt holder can be adjusted in position where the drilling axis intersects the periphery of the circle.
- But this method can be needlessly complicated.
- The present invention provides a layout which in a very easy way provides switching between drilling and inserting of bolts in cases when the distance between borehole and drilling machine is not enough to find room for the bolt.
- Accordingly, the feed beam moves in the lateral direction, so that the drilling machine can easily move to a position where it is not in the way of the bolt inserting, thus easily providing a longer clear distance in the outward extension of the borehole, while feed beam and carriage are still pointing in the drilling direction, though displaced laterally relative to the drilling axis, and so can be used to insert the rock bolt as described below.
-
FIG. 3 shows the feed unit ofFIG. 2 , but from a different perspective, to show the sample embodiment of the invention in more detail. As mentioned, the feed unit (feeder holding device 106) is secured to thedrilling support 103 viaopenings 107, 108, running alongguide ways hydraulic cylinder 303. - During drilling, the feeder holding device is moved along the
guide ways stops stop - On the other hand, when inserting a bolt into a newly drilled hole, the feed unit is moved along the
guide ways FIG. 3 , so that the drilling machine is moved laterally, and the bolt (or a first bolt section, if the bolt consists of several sections) can be placed against the drilled hole (or added to the preceding bolt element) so as to place the end of the bolt away from the hole against abolt support 306 arranged on thecarriage 122, and then the bolt or bolt element can be pushed into the hole by operation of thefeed beam 111 andcarriage 122 via thebolt support 306. Accordingly, thefeed beam 111 will automatically be properly oriented and thus it can easily be positioned, by operating thecylinder 303, in the position shown inFIG. 3 for pushing in the bolt. Since the bolt support can be arranged substantially at a longer distance from the drilling hole compared to the front edge of the drilling machine, the invention provides by a simple displacement mechanism thus enables bolting with longer lengths than would be possible without any movement of the drilling machine. After the bolt has been pushed into the borehole, the drilling machine is moved back thanks to the displacement mechanism into the drilling position, where the drilling machine can be used for appropriate rotation of the bolt. - In the description above, the movement mechanism of the invention is shown travelling along two guide ways and essentially perpendicular to the drilling direction. However, the movement need not be perpendicular to the drilling direction, as long as the movement results in the drilling machine moving linearly lateral while retaining the orientation (i.e., in parallel to the drilling direction) of the carriage.
- For example, the
guide ways FIG. 4 , which shows part of the feed unit ofFIG. 2 , and where theguide ways guides FIG. 4 instead are bent backward (compared to the drilling direction), and the feeder holding device has correspondingly slantedopenings - Moreover, although the invention in the above specification has been illustrated with a certain type of feed unit, the invention is equally applicable to other types of feed units. What is essential to the invention is that a feed beam is moved linearly in relation to a boom (or in relation to a device attached to a boom, such as a drilling support) and in a direction other than the drilling direction in such a way that the feed beam after displacement still is parallel to the position before movement.
- Thus, the appearance of the feeder holding device can also differ substantially from the embodiment in the figure, without thereby departing from the invention as defined in the enclosed claims. In theory, the feeder holding device can take on any desired appearance, as long as it provides the movement of the feed beam relative to the boom according to the invention.
- For example, it can consist of only one guide way, or of a totally different movement mechanism, as long as linear lateral movement of the feed beam is allowed with maintained orientation.
- For example, the openings can be integrated with the feed beam, in which case the feed beam thus is laterally displaceable exactly as described above, with the difference that the feed beam is not movable in the drilling direction relative to the feeder holding device.
- Moreover, the guide ways (or corresponding sliding means) can be firmly joined to the feed beam, at which they instead travel in suitable means on the boom (or, as in the embodiment illustrated here, a means attached to the boom, such as a drilling support). Likewise, the movement driving means (
hydraulic cylinder 303 above) can be attached to the boom or the drilling support, or the feed beam. - Moreover, the invention above has been described in regard to a specific type of feed beam. As is realized however, the invention can also be used for other types of feed beams, e.g., feed beams with more or fewer guide ways, or feed beams whose carriage slides along sliding surfaces and not necessarily on guide ways.
Claims (20)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0801050-6 | 2008-05-09 | ||
SE0801050A SE532412C2 (en) | 2008-05-09 | 2008-05-09 | Rock drilling equipment |
SE0801050 | 2008-05-09 | ||
PCT/SE2009/000242 WO2009136843A1 (en) | 2008-05-09 | 2009-05-11 | Rock drilling device |
Publications (2)
Publication Number | Publication Date |
---|---|
US20110036634A1 true US20110036634A1 (en) | 2011-02-17 |
US8636083B2 US8636083B2 (en) | 2014-01-28 |
Family
ID=41264773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/736,650 Expired - Fee Related US8636083B2 (en) | 2008-05-09 | 2009-05-11 | Rock drilling device |
Country Status (7)
Country | Link |
---|---|
US (1) | US8636083B2 (en) |
EP (1) | EP2304178A1 (en) |
AP (1) | AP3064A (en) |
RU (1) | RU2488000C2 (en) |
SE (1) | SE532412C2 (en) |
WO (1) | WO2009136843A1 (en) |
ZA (1) | ZA201006661B (en) |
Cited By (5)
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---|---|---|---|---|
US20150218947A1 (en) * | 2014-02-04 | 2015-08-06 | Brandt Engineered Products Ltd. | Method of operating a rock bolting machine |
CN107725062A (en) * | 2017-11-08 | 2018-02-23 | 大同市巴什卡机械制造有限公司 | Heading and anchoring integrated machine |
CN113153390A (en) * | 2021-04-30 | 2021-07-23 | 中煤科工开采研究院有限公司 | Anchor rod drill carriage |
CN113414589A (en) * | 2021-05-31 | 2021-09-21 | 中铁工程服务有限公司 | Anchoring robot |
CN113638696A (en) * | 2021-08-27 | 2021-11-12 | 中国煤炭科工集团太原研究院有限公司 | Fine adjustment mechanism |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210032933A1 (en) * | 2018-04-24 | 2021-02-04 | Resemin S.A. | Dual electrohydraulic vehicle for tunnelling and roof reinforcement |
CN109577857A (en) * | 2019-01-28 | 2019-04-05 | 安徽宏昌机电装备制造有限公司 | Pneumatic roof bolter |
Citations (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2698735A (en) * | 1949-09-13 | 1955-01-04 | Joy Mfg Co | Drilling apparatus |
US3729056A (en) * | 1970-04-18 | 1973-04-24 | F Paurat | Mining and excavating apparatus |
US3797587A (en) * | 1972-01-03 | 1974-03-19 | Robbins Co | Sleeve cylinder powered drilling machine |
US3951216A (en) * | 1974-11-08 | 1976-04-20 | Canadian Mine Services Ltd. | Diamond drill supporting apparatus |
US3999805A (en) * | 1974-11-26 | 1976-12-28 | Lockwood Bennett Ltd. | Articulated support |
US4069877A (en) * | 1976-11-09 | 1978-01-24 | Gardner-Denver Company | Mechanism for tensioning fluid hoses on a rock drill feed |
US4199193A (en) * | 1978-07-28 | 1980-04-22 | Acme Machinery Company | Underground mining machine having temporary roof support means and roof bolting means associated therewith |
US4251046A (en) * | 1978-01-17 | 1981-02-17 | Coal Industry (Patents) Limited | Extensible beam arrangement |
US4284368A (en) * | 1979-01-18 | 1981-08-18 | Fmc Corporation | Vehicle with dual drill booms and temporary roof support |
US4290490A (en) * | 1979-04-16 | 1981-09-22 | Schroeder Brothers Corporation | Roof bolting device |
US4346766A (en) * | 1979-04-04 | 1982-08-31 | Salzgitter Maschinen Und Anlagen Aktiengesellschaft | Drill cradle with elongated slide track |
US4398850A (en) * | 1981-02-09 | 1983-08-16 | Copper Range Company | Roof bolter and process |
US4456077A (en) * | 1981-05-14 | 1984-06-26 | Craelius Ab | Device for reciprocating motion of a rotating drilling body of a drilling machine |
US4640369A (en) * | 1984-11-07 | 1987-02-03 | Ingersoll-Rand Company | Slide bar mining bolting machine |
US4915180A (en) * | 1988-11-07 | 1990-04-10 | Schisler Ralph T | Post driver |
US5913573A (en) * | 1994-11-28 | 1999-06-22 | Voest-Alpine Bergtechnik Gesellschaft M.B.H. | Roof bolt drilling and setting apparatus |
US6082469A (en) * | 1995-08-09 | 2000-07-04 | Kromray, Jr.; Paul | Doweling hole drilling machine |
US6105684A (en) * | 1996-08-08 | 2000-08-22 | Cram Australia Pty Ltd | Roof bolter or a roof bolt installation apparatus |
US6481507B1 (en) * | 1995-08-09 | 2002-11-19 | Paul Kromray, Jr. | Doweling hole drilling machine |
US6497536B1 (en) * | 1998-01-16 | 2002-12-24 | Joy Mm Delaware, Inc. | Roof support arrangement for mining apparatus and roof bolting equipment |
US6550544B1 (en) * | 1998-09-03 | 2003-04-22 | Atlas Copco Rock Drills Ab | Rock drilling device |
US6672410B2 (en) * | 2001-09-25 | 2004-01-06 | Ingersoll-Rand Company | Drilling machine having a feed cable tensioner |
US6814155B1 (en) * | 2000-04-14 | 2004-11-09 | Joy M M Delaware, Inc. | Bolting rigs |
US20050103509A1 (en) * | 2003-11-18 | 2005-05-19 | Sandvik Tamrock Secoma Sas | Drilling and bolting head for a bolting machine |
US20050129466A1 (en) * | 2003-12-16 | 2005-06-16 | Voest-Alpine Bergtechnik Gesellschaft M.B.H. | Roadheading or mining machine with roof bolt drilling and setting devices |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2432877C2 (en) | 1974-07-09 | 1982-08-19 | Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter | Driving and mining machine |
US3995905A (en) | 1975-03-03 | 1976-12-07 | Consolidation Coal Company | Method and apparatus for roof bolting and transferring mined material |
SU607032A1 (en) * | 1975-07-29 | 1978-05-15 | Центральный Научно-Исследовательский И Проектно-Конструкторский Институт Проходческих Машин И Комплексов Для Угольной,Горной Промышленности И Подземного Строительства | Anchoring unit |
SU1097788A1 (en) * | 1983-03-03 | 1984-06-15 | Anosov Viktor V | Entry-driving machine |
AT380924B (en) | 1983-10-14 | 1986-07-25 | Ver Edelstahlwerke Ag | DRILL ARM |
SU1567765A1 (en) * | 1987-04-13 | 1990-05-30 | Новочеркасский Политехнический Институт Им.Серго Орджоникидзе | Mining unit |
AUPR576501A0 (en) | 2001-06-18 | 2001-07-12 | Russell Mineral Equipment Pty Ltd | Rock bolting apparatus and method |
JP4315842B2 (en) | 2004-02-27 | 2009-08-19 | 西日本旅客鉄道株式会社 | Rock bolt driving machine |
WO2006133190A2 (en) * | 2005-06-03 | 2006-12-14 | J.H. Fletcher & Co. | Automated, low profile drilling/bolting machine |
-
2008
- 2008-05-09 SE SE0801050A patent/SE532412C2/en not_active IP Right Cessation
-
2009
- 2009-05-11 US US12/736,650 patent/US8636083B2/en not_active Expired - Fee Related
- 2009-05-11 AP AP2010005486A patent/AP3064A/en active
- 2009-05-11 EP EP09742925A patent/EP2304178A1/en not_active Withdrawn
- 2009-05-11 WO PCT/SE2009/000242 patent/WO2009136843A1/en active Application Filing
- 2009-05-11 RU RU2010150351/03A patent/RU2488000C2/en not_active IP Right Cessation
-
2010
- 2010-09-16 ZA ZA2010/06661A patent/ZA201006661B/en unknown
Patent Citations (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2698735A (en) * | 1949-09-13 | 1955-01-04 | Joy Mfg Co | Drilling apparatus |
US3729056A (en) * | 1970-04-18 | 1973-04-24 | F Paurat | Mining and excavating apparatus |
US3797587A (en) * | 1972-01-03 | 1974-03-19 | Robbins Co | Sleeve cylinder powered drilling machine |
US3951216A (en) * | 1974-11-08 | 1976-04-20 | Canadian Mine Services Ltd. | Diamond drill supporting apparatus |
US3999805A (en) * | 1974-11-26 | 1976-12-28 | Lockwood Bennett Ltd. | Articulated support |
US4069877A (en) * | 1976-11-09 | 1978-01-24 | Gardner-Denver Company | Mechanism for tensioning fluid hoses on a rock drill feed |
US4251046A (en) * | 1978-01-17 | 1981-02-17 | Coal Industry (Patents) Limited | Extensible beam arrangement |
US4199193A (en) * | 1978-07-28 | 1980-04-22 | Acme Machinery Company | Underground mining machine having temporary roof support means and roof bolting means associated therewith |
US4284368A (en) * | 1979-01-18 | 1981-08-18 | Fmc Corporation | Vehicle with dual drill booms and temporary roof support |
US4346766A (en) * | 1979-04-04 | 1982-08-31 | Salzgitter Maschinen Und Anlagen Aktiengesellschaft | Drill cradle with elongated slide track |
US4290490A (en) * | 1979-04-16 | 1981-09-22 | Schroeder Brothers Corporation | Roof bolting device |
US4398850A (en) * | 1981-02-09 | 1983-08-16 | Copper Range Company | Roof bolter and process |
US4456077A (en) * | 1981-05-14 | 1984-06-26 | Craelius Ab | Device for reciprocating motion of a rotating drilling body of a drilling machine |
US4640369A (en) * | 1984-11-07 | 1987-02-03 | Ingersoll-Rand Company | Slide bar mining bolting machine |
US4915180A (en) * | 1988-11-07 | 1990-04-10 | Schisler Ralph T | Post driver |
US5913573A (en) * | 1994-11-28 | 1999-06-22 | Voest-Alpine Bergtechnik Gesellschaft M.B.H. | Roof bolt drilling and setting apparatus |
US6082469A (en) * | 1995-08-09 | 2000-07-04 | Kromray, Jr.; Paul | Doweling hole drilling machine |
US6481507B1 (en) * | 1995-08-09 | 2002-11-19 | Paul Kromray, Jr. | Doweling hole drilling machine |
US6105684A (en) * | 1996-08-08 | 2000-08-22 | Cram Australia Pty Ltd | Roof bolter or a roof bolt installation apparatus |
US6497536B1 (en) * | 1998-01-16 | 2002-12-24 | Joy Mm Delaware, Inc. | Roof support arrangement for mining apparatus and roof bolting equipment |
US6602026B1 (en) * | 1998-01-16 | 2003-08-05 | Joy Mm Delaware, Inc. | Extendible drill support frame for mining apparatus and roof bolting equipment |
US6550544B1 (en) * | 1998-09-03 | 2003-04-22 | Atlas Copco Rock Drills Ab | Rock drilling device |
US6814155B1 (en) * | 2000-04-14 | 2004-11-09 | Joy M M Delaware, Inc. | Bolting rigs |
US6672410B2 (en) * | 2001-09-25 | 2004-01-06 | Ingersoll-Rand Company | Drilling machine having a feed cable tensioner |
US20050103509A1 (en) * | 2003-11-18 | 2005-05-19 | Sandvik Tamrock Secoma Sas | Drilling and bolting head for a bolting machine |
US7032686B2 (en) * | 2003-11-18 | 2006-04-25 | Sandvik Tamrock Secoma Sas | Drilling and bolting head for a bolting machine |
US20050129466A1 (en) * | 2003-12-16 | 2005-06-16 | Voest-Alpine Bergtechnik Gesellschaft M.B.H. | Roadheading or mining machine with roof bolt drilling and setting devices |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150218947A1 (en) * | 2014-02-04 | 2015-08-06 | Brandt Engineered Products Ltd. | Method of operating a rock bolting machine |
US9506345B2 (en) * | 2014-02-04 | 2016-11-29 | Brandt Engineered Products Ltd. | Method of operating a rock bolting machine |
CN107725062A (en) * | 2017-11-08 | 2018-02-23 | 大同市巴什卡机械制造有限公司 | Heading and anchoring integrated machine |
CN113153390A (en) * | 2021-04-30 | 2021-07-23 | 中煤科工开采研究院有限公司 | Anchor rod drill carriage |
CN113414589A (en) * | 2021-05-31 | 2021-09-21 | 中铁工程服务有限公司 | Anchoring robot |
CN113638696A (en) * | 2021-08-27 | 2021-11-12 | 中国煤炭科工集团太原研究院有限公司 | Fine adjustment mechanism |
Also Published As
Publication number | Publication date |
---|---|
RU2488000C2 (en) | 2013-07-20 |
SE0801050L (en) | 2009-11-10 |
US8636083B2 (en) | 2014-01-28 |
AP3064A (en) | 2014-12-31 |
AP2010005486A0 (en) | 2010-12-31 |
WO2009136843A1 (en) | 2009-11-12 |
ZA201006661B (en) | 2011-11-30 |
SE532412C2 (en) | 2010-01-12 |
EP2304178A1 (en) | 2011-04-06 |
RU2010150351A (en) | 2012-06-20 |
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